Describes the use of a multi-transputer system for the implementation of high-performance vector control strategies for AC induction motors. These strategies constitute a complex real-time signal processing system and, as such, highlight the advantages and disadvantages of using parallelism for real-time motor control. The assessment of the transputer performance is felt to be significant, as it i...
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One of the obstacles to the more extensive use of nonlinear models in the control of highly nonlinear systems, such as chemical processing equipment, is the computational difficulty of solving the relevant nonlinear differential algebraic equations in real time. Transputer systems offer sufficient power to enable these equations to be handled rapidly and are now cheap enough to enable their implem...
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The design of a hardware accelerator for supporting CACSD (computer-aided control systems design) computations is considered in relation to H/sup infinity / design. The key algorithms are identified and parallel solutions formulated. The speedup of these techniques is then assessed with respect to trial implementations on a network of transputers.<>
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A model-based fault diagnostic procedure is proposed for an eddy-current test instrument which utilises the multiple model estimation algorithm (MMEA). This algorithm essentially consists of a set of Kalman filters and is an ideal candidate for realisation by parallel-processing techniques. A practical instrument has been developed, consisting of a commercially available eddy current test instrume...
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Orthogonal functions, and, in particular, Walsh functions, have been advocated in the literature as a method of approximating the solutions of singular systems Ex'=Fx+Bu of index k. The paper gives the first analysis of the accuracy of these approximations. For Walsh functions, divergence is shown for k>or=3 and convergence for k=0,1. The k=2 case is also analysed.<>
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The paper discusses the problem of tracking multiple targets from noisy measurement data. One possible solution, a branching or track splitting algorithm, is described in detail, and it is shown how the multiple tracking filters required can be distributed on parallel processors. Simulation results are given for specific scenarios obtained using both a transputer network and several Sun workstatio...
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The paper reviews published systolic algorithms for both standard and square-root Kalman filtering. The formation of these complex arrays from simpler ones for matrix computations, including multiplication, backsubstitution, orthogonal decomposition and the Schur complement, is described. The Kalman filter arrays are compared in terms of the number of parallel computations required and the speed a...
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The robot control problem is discussed with regard to controller implementation on a multitransputer array. Some high-performance aspects required of such controllers are described, with particular reference to robot force control. The implications for the architecture required for controllers based on computed torque are discussed and an example is described. The idea of treating a transputer arr...
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Investigates the potential of parallel processing, and one device, in particular, the Inmos transputer, in the design of a fault-tolerant high-integrity computer module for gas-turbine engine control. While three-lane voting systems are commonly favoured in avionics systems, owing to hardware implementation constraints, gas-turbine engine controllers are generally realised as two-lane systems. Tra...
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Aims & Scope

Published from 1980-1993, IEE Proceedings D contained significant and original contributions on control theory and its applications. It was devoted to control systems in the broadest sense, covering new theoretical results and the applications of new and established control methods.